在服务程序中调用GetGuiResources怎样查看explorer进程的GDI个数

[chwjbn]

bRet=WTSQueryUserToken(Int32.Parse(mobj["SessionId"].ToString()), out hToken);

bRet=DuplicateTokenEx(hToken,GENERIC_ALL_ACCESS, ref sa,(int)SECURITY_IMPERSONATION_LEVEL.SecurityIdentification,(int)TOKEN_TYPE.TokenPrimary,ref hDupedToken);

bRet=ImpersonateLoggedOnUser(hDupedToken);
InfoTable.Add("GDIs", GetGuiResources(iTemp, 0));

bRet=RevertToSelf();

上面代码不报错,GetLastError是没有错误的